Question 1

What is the approximate C-C-C bond angle in propene,CH3CH = CH2?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) None of the above
F) A) and B)

Question 2

Which of the following compounds has an atom with an unfilled valence shell of electrons?

Accepted Answer

A)  H2O
B)  BCl3
C)  CH4
D)  CO2E) C) and D)
F) B) and C)

Question 3

Which of the following molecules has a net dipole moment of zero?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) C) and D)
F) None of the above

Question 4

What is the hybridization for each of the indicated atoms in the following compound? 2; II = sp2; III = sp2. B) I = sp2; II = sp3; III = sp3. C) I = sp; II = sp2; III = sp3. D) I = sp2; II = sp2; III = sp3." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I = sp2; II = sp2; III = sp2.
B)  I = sp2; II = sp3; III = sp3.
C)  I = sp; II = sp2; III = sp3.
D)  I = sp2; II = sp2; III = sp3.E) C) and D)
F) None of the above

Question 5

Which of the following statements about bonding is true?

Accepted Answer

A)  Covalent bonds result from the transfer of electrons from one element to another.
B)  Ionic bonds result from the transfer of electrons from a metal to a non-metal.
C)  Ionic bonds result from the sharing of electrons between two non-metals.
D)  Covalent bonds result from the sharing of electrons between two metals.E) None of the above
F) All of the above

Question 6

Rank the following atoms in order of decreasing electronegativity,putting the most electronegative first.  IV > II > III B) II > III > IV > I C) III > IV > II > I D) III > II > IV > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > IV > II > III
B)  II > III > IV > I
C)  III > IV > II > I
D)  III > II > IV > IE) All of the above
F) C) and D)

Question 7

Which of the following atoms will have a full 3s orbital in the ground state?

Accepted Answer

A)  Hydrogen
B)  Lithium
C)  Potassium
D)  RubidiumE) A) and B)
F) A) and C)

Question 8

What is the formal charge of carbon in carbon monoxide (CO) when drawn with a triple bond?

Accepted Answer

A)  0
B)  -2
C)  -1
D)  +1E) None of the above
F) C) and D)

Question 9

In which of the following ions does carbon have a formal charge?

Accepted Answer

A)  I
B)  II
C)  III
D)  None of theseE) A) and D)
F) A) and C)

Question 10

Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde,H2CO. 2CO.   A) I > II > III B) I > III > II C) II > I > III D) III > II > I" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I > II > III
B)  I > III > II
C)  II > I > III
D)  III > II > IE) A) and D)
F) B) and C)

Question 11

How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) B) and D)
F) B) and C)

Question 12

Which of the following would you expect to have ionic bonds?

Accepted Answer

A)  CO
B)  FBr
C)  NF3
D)  NaClE) A) and C)
F) A) and D)

Question 13

What is the ground-state electronic configuration of a magnesium cation (Mg2+) ?

Accepted Answer

A)  1s2,2s2,2p6
B)  1s2,2s2,2p6,3s1
C)  1s2,2s2,2p6,3s2
D)  1s2,2s2,2p6,3s2,3p2E) A) and B)
F) A) and C)

Question 14

Which atomic orbitals overlap to form the carbon-carbon s bonding molecular orbital of acetylene,C2H2?

Accepted Answer

A)  Csp2 + Csp2
B)  Csp + Csp
C)  Csp3 + Csp3
D)  C2p + C2pE) None of the above
F) A) and C)

Question 15

Which of the following molecules has the smallest dipole moment?

Accepted Answer

A)  CO2
B)  HCl
C)  H2O
D)  NH3E) B) and C)
F) A) and D)

Question 16

Which of the following statements about valence electrons is true?

Accepted Answer

A)  They are the most tightly held electrons.
B)  They do not participate in chemical reactions.
C)  They are the outermost electrons.
D)  They reveal the period number of a second-row element.E) All of the above
F) A) and B)

Question 17

Follow the curved arrows to draw the second resonance structure for the ion below.

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and C)
F) B) and C)

Question 18

Which of the following compounds has an atom with more than eight valence electrons?

Accepted Answer

A)  H2CO3
B)  H2SO4
C)  H2O
D)  HBrE) B) and C)
F) A) and B)

Question 19

What is the approximate H-C-O bond angle in formaldehyde,H2CO?

Accepted Answer

A)  90°
B)  109.5°
C)  120°
D)  180°E) A) and B)
F) C) and D)

Question 20

Which of the following statements about resonance structures is not true?

Accepted Answer

A)  There is no movement of electrons from one form to another.
B)  Resonance structures are not isomers.
C)  Resonance structures differ only in the arrangement of electrons.
D)  Resonance structures are in equilibrium with each other.E) B) and D)
F) A) and D)

Exam 1: Structure and Bonding

What is the approximate C-C-C bond angle in propene,CH3CH = CH2?

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What is the ground-state electronic configuration of a magnesium cation (Mg2+) ?

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Which of the following statements about bonding is true?

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Which of the following molecules has a net dipole moment of zero?

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Which of the following atoms will have a full 3s orbital in the ground state?

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In which of the following ions does carbon have a formal charge?

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How many constitutional isomers are there for a molecule having the molecular formula C3H8O?

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Follow the curved arrows to draw the second resonance structure for the ion below.

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Which of the following molecules has the smallest dipole moment?

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Which of the following compounds has an atom with more than eight valence electrons?

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Which of the following statements about valence electrons is true?

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What is the formal charge of carbon in carbon monoxide (CO) when drawn with a triple bond?

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Which of the following would you expect to have ionic bonds?

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Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde,H2CO.

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Rank the following atoms in order of decreasing electronegativity,putting the most electronegative first.

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What is the approximate H-C-O bond angle in formaldehyde,H2CO?

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What is the hybridization for each of the indicated atoms in the following compound?

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Which of the following compounds has an atom with an unfilled valence shell of electrons?

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Which of the following statements about resonance structures is not true?

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Which atomic orbitals overlap to form the carbon-carbon s bonding molecular orbital of acetylene,C2H2?

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What is the approximate C-C-C bond angle in propene,CH₃CH = CH₂?

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What is the ground-state electronic configuration of a magnesium cation (Mg²⁺) ?

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How many constitutional isomers are there for a molecule having the molecular formula C₃H₈O?

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Rank the following in order of decreasing importance as contributing structures to the resonance hybrid of formaldehyde,H₂CO.

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What is the approximate H-C-O bond angle in formaldehyde,H₂CO?

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Which atomic orbitals overlap to form the carbon-carbon s bonding molecular orbital of acetylene,C₂H₂?

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